I would like to know what kind of batteries do other XLT users use in their machines, and how long do they typically last. How do you decide when it is time for new ones. I am pretty new to this and have only used alkalines and NiMh. I have no problems with the alkalines (Only on my second set) and I had no luck with the Nimn, you can check my other post on the White's forum if you want to see what that is all about.